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Everything You Need to Know about Shielding Fabrics and Conductive Tapes

With the threat of electromagnetic interference (EMI) looming over modern electronic devices, our electrical engineers and manufacturers are coming up with new and innovative ways to safeguard sensitive equipment and maintain efficient performance. One such technique involves the use of shielding fabrics and conductive tapes. But what are these components and how do they fit into your project? Find out below.

Shielding Fabrics

The absorption and reflection of radio frequency (RF) signals impacts shielding effectiveness. While absorption depends upon the thickness of the shielding material, reflection occurs at the shield surface and thickness has no bearing on its effectiveness. Considering how reflection is the determining factor for high-frequency signal attenuation, you can achieve maximum reflection with our fabric shielding materials that consist of highly conductive metals like nickel, copper, or a combination of both, on the one hand, and light fabric on the other. All these materials are available in hot melt, non-adhesive or conductive adhesive backing.


While our standard sheets have dimensions of 41 X 36 inches, longer sheets can be custom ordered. Leader Tech also offers full rolls that are 325 feet long, but the conductive adhesive versions reach a maximum length of 164 feet.

Thanks to conductive adhesive or hot melt, our shielding fabrics can easily be laminated or bonded to complex geometrical shapes. Get the benefit of large surface coverage with minimal seams owing to the material width of 41 inches.


Our product is perfect for sealing enclosure panels and frames, joints or seams. You can even use our shielding fabric products for architectural shielding or to finish the ceiling and walls of shielded rooms. The RFI-EMI/ESD shielding attenuation of copper-nickel type shielding fabrics ranges from 70 dB up to 10 GHz.

Fabric Shielding Tape

Leader Tech’s fabric shielding tape is designed to offer outstanding shielding performance. It is manufactured with metalized fabric and high-quality adhesive for excellent adherence. These products are suitable for both EMI shieldingand grounding purposes.


Our fabric shielding tapes are made of copper-nickel metalized fabric and feature a conductive acrylic adhesive backing with the release liner. Copper tape is also available.

Our conductive fabric shielding tape can easily be applied to plastic housings for creating an EMI-shielded enclosure. The service temperature – the temperature at which this material can operate – varies between -40 degrees Fahrenheit to 212 degrees Fahrenheit, while the adhesion is 50 ounce per inch. The most significant advantage of this product is its resistance to abrasion and corrosion.


Leader Tech’s fabric shielding tapes can be used to shield printed circuit boards (PCB), irregular surface components, cables, room joints, and enclosures. In several applications, they provide a suitable substitute for custom die-cut shielding sections or gaskets.

If you are looking to ensure the highest degree of protection for your electronic equipment, trust Leader Tech’s shielding fabrics, and conductive tapes. For more information about these products and ordering information, refer to part numbers SF005PCN, SF030PCU, and SF050PNI for shielding fabrics and ST005PCN25, ST005PCN50, ST005PCN75, ST005PCN100, and ST005PCN200 for conductive tapes. –

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Conductive Elastomers in EMI Shielding: How Leader Tech Can Help

The conductive elastomers are mostly used in shielding the electronic enclosures to prevent the electromagnetic interference. The entire EMI shielding system is made up with a conductive gasket that is placed between a metal housing and a lid. This set up allows for providing sufficient electrical conductivity across the gasket.

5 Standard Characteristics of Conductive Elastomers

Generally, the conductive elastomers are available with or without the adhesive backing, and there are specific characteristics to serve the unique requirements of the industry. They are:

• High-end mechanical properties which allow it to suit all environments
• Excellent electromagnetic shielding properties
• Wide temperature range
• Made of polymer silicone, fluorosilcone, or EPDM
• The effectiveness of shielding can extend up to 120dB at 10GHz.

Application Areas

When there’s the need to create an EMI shielding along with environmental sealing, the electrically conductive elastomers prove to be the ideal choice. The highly conductive as well as resilient characteristics of the gasketing elements allows it to be used in a broad spectrum of fields – wirelessly transmitting device, commercial electronics, and military devices.

5 Benefits of Using Conductive Elastomers from Leader Tech

• To ensure the galvanic compatibility, a broad combination of materials are available to choose from
• Since the manufacturing process takes place in the USA, it automatically allows for short lead-times, prototyping, and ITAR compliance.
• Leader Tech’s TechSIL Conductive Elastomers are made up of a wide variety of polymers and types of fillers that are available in various colors and hardnesses. Consult factory for options.
• Leader Tech offers elastomers in all possible profiles and shapes, and with different mounting methods. This variety helps meet clients’ specific requirements.
• Only Leader Tech can provide the best low compression forces that are highly achievable at a competitive market prices.

Leader Tech is an engineering-oriented enterprise that has kept service to the global clientele as their focus with application-specific solutions from prototype to high volume productions. Leader Tech is one of a few EMI shielding experts in the USA that approves 11MIL-DTL-83528 materials. You can browse over 2,000 part numbers to find a suitable solution. EMI shielding being their specialty, Leader Tech can be your trusted partner for all shielding solutions. -Leader Tech

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How to Decrease EMI and Increase Radio Range?

Electromagnetic interference (EMI) reduces radio range, drastically decreasing the functionality of Internet of Things products. There are some local and intermittent EMIs that are eventually get addressed, thanks to the Wi-Fi protocols that come complete with automatic retry features. However, the interference coming from external sources are continuous in nature and can drastically reduce the range of a device’s onboard radio. This kind of interference has to be addressed by the right mechanical and PCB design. But what about the interferences that come right from your own product?  Here are some useful tips that will help you minimize the EMI being emitted by your product and improve radio range:

PCB Shielding

Metal shields isolate circuits and prevent interference from reaching the antenna. At the same time, the antenna needs to be present outside the shield for receiving signals. So, shielding the interference sources is a better option than shielding the receiver. The Faraday cage is the best shielding solution available that provides a conductive box without any seams around the shielded circuitry.

However, you must develop metal shields with minimal contact resistance. And, there are several options to achieve this:

  • Pick clear chromate instead of aluminum as it provides decent conductivity while resisting corrosion.
  • Use an overlapping structure for an increased area and decreased contact resistance.
  • Minimize contact resistance through gaskets that rely on screws outside the gasket for more reliable contact and compression force.

Select the Right Clock Frequencies

Certain circuits are never switched off, and the resulting interference affects the receiver’s sensitivity. In a controller board, for example, clock oscillator signal harmonics cannot be controlled easily and lead to interference. There is one clock of 19.2 MHz and another of 25 MHz in a Raspberry Pi design. While the latter falls between the popular non-overlapping Wi-Fi frequencies, the former falls inside the Wi-Fi frequency channels. So, even though the 25 MHz clock doesn’t solve the interference issue entirely, it does help to a certain extent.

Check for EMI Issues

Detecting interference issues becomes easier with a spectrum analyzer. Select one that has greater maximum frequency than the system radio’s highest frequency. When an antenna probe is connected to this analyzer, it can detect design problems and locate interference sources. No wonder this setup is used by the FCC to test for EMI compliance and radio performance issues.

Switching up the components of a PCB can work wonders when it comes to decreasing EMI interference and improving radio range. Sure, it’s better if you detect all the problems as early as possible, but it’s worth noting that following the steps above can result in a design that minimizes EMI emission and prevents interference from affecting other parts of the radio system. To know more about EMI shielding, click here. -LeaderTech

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How to Ensure Corrosion Resistant EMI Protection

EMI shielding products are designed to protect electronics from the effects of interfering energy waves. But what happens when you use your equipment in an extremely damp environment? In such a situation, your priority should be to make your EMI shielding products corrosion-resistant. Rust or material deterioration will affect device performance due to high-frequency emissions interfering with your electronic gadgets. Here are a few ways to protect your equipment from corrosion:

Consider Surface Treatment

Paint or plate your electronic enclosures. It is essential to prevent corrosion, oxidation, rusting, and tarnishing. Maintain application aesthetics. When it comes to the flange surfaces, they require finishing for maximum protection against corrosion. There are a few factors to consider when employing finishing. You must ensure maximum shielding efficiency through corrosion-resistant and electrically conductive materials. You will require an additional coating for protecting shielded products from being corroded in high humidity surroundings.

Pick out Quality EMI Gaskets

Choose the right gasket material that can cut back the variation in electrochemical potential in relation to the metal structure. It helps to decelerate the corrosion process through a lower galvanic current. Opt for elastomeric gaskets that come with filler particles. The material will ensure both corrosion resistance and EMI shielding when exposed to metal. Use silver-plated copper, pure silver, and silver-plated aluminum fillers to ensure corrosion resistant EMI protection.

Opt for Additional Moisture Sealing

Spray or salt fog acting as an electrolyte may corrode your shielding materials. This is the reason why designers require secondary moisture sealing to get rid of it. To prevent corrosion in aircraft applications, a seal-to-seal design is the preferred choice of EMI shielding engineers. Similar gasket materials are used in every mating flange. Non-conductive sealers are used to stop water from seeping into your shielded products.

Choose the right EMI gasket material for protection against water, fog, or salt spray. The use of conductive coating and an additional moisture seal will keep corrosion under control for improved shielding effectiveness. If you want to learn more about our products, contact us today.

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Is It True That Today’s Auto-Makers Rely Heavily on the EMI-Shielding Industry?

Rapid advancements in electromagnetic interference (EMI) shielding technology has served to make the driving experience in modern vehicles smooth and hassle-free. The addition of new systems, such as on-board GPS, in-vehicle communication, wireless charging, and touchscreen infotainment, is a big draw for modern consumers and increases the value of a vehicle considerably. Unfortunately, these devices are also responsible for the emission of unwanted EMI. The problem is compounded by the constant use of smartphones, tablets, and other wireless equipment in and around cars. While these emissions pose a threat to automobile applications, they create opportunities for shielding materials to grow in this sector.

More EMI in Vehicles Means More Shielding

EMI emission varies across automobile technologies, and so does the need for EMI shielding. For example, protection is a must in cars employing advanced electronics for engine performance. Still, automobile manufacturers need to get in touch with EMI shielding suppliers and implement the technology early on during the design stages. That’s because, the more personalized and innovative the solution, the better.

Electric motors and other electronic systems appear to be the most culpable among all automobile technology. They emit massive levels of EMI that cause widespread problems, ranging from malfunctions to breakdowns. So, for the protection of the different components in vehicles and ensuring they are compatible, modern car designers should make provisions for EMI shielding.

Relation Between Automobile Manufacturing Materials and EMI

The evolving nature of the materials used to construct modern vehicles means EMI shielding must keep up at all times. New vehicles utilize sheet metal to deter external EMI. With more and more automobile companies switching to non-metallic components for the production of auto body parts, it might be a good idea for shielding engineers to redirect their efforts towards devising a foolproof solution for the protection of the vehicle interiors.

Hurdles in Store

The process of designing EMI shielding for a new vehicle model is time-consuming and expensive, but it should not be neglected. Detection of EMI issues late in production can bring the manufacturing process to a halt while the engineers attempt to uncover what went wrong. Perhaps the biggest hurdle lies in figuring out the perfect moment to install shielding in vehicles. Often, EMI signals, like those produced in vehicle interiors, are so faint that it is difficult to figure out which components are at risk. But implementing EMI shielding during the design process increases its effectiveness while decreasing the cost.

The growing demand for integrated electronics within vehicles means the EMI shielding industry will need to step up its game.  There will be hurdles, of course, but with the right design, materials, and manufacturing process, successful EMI shielding can be a reality. To know more about vehicular EMI shielding, contact us here. – Blog by Leader Tech